Certified Paraoptometric Practice Test

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Prepare for the Certified Paraoptometric Test! Study using flashcards, multiple choice questions, and detailed explanations. Get ready for your exam and boost your optometric skills!

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These lenses are also called convex lenses. They are thick in the center and thin on the edges. Light rays passing through these lenses will be converged. What are they?

  1. Cylinder lenses

  2. Minus lenses

  3. Plus lenses

  4. Prism lenses

The correct answer is: Plus lenses

These lenses are called Plus lenses because they have a thicker center and thinner edges, which are curved outward. This shape allows light rays passing through the lens to be converged, bringing the rays closer together. Cylinder lenses (A) have a curved surface only in one direction, Minus lenses (B) are thinner in the center and thicker at the edges, and Prism lenses (D) deflect light, rather than converging it. Therefore, none of these options are correct.

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